git.slaskete.net - einar-bin/blob - minecraft.sh

   1 #!/bin/bash
   2 # This script assumes that you have prepared various versions of
   3 # Minecraft bin folders in your $MC_HOME like this:
   4 # ${MC_HOME}/bin-version (example: ${MC_HOME}/bin-1.2.5)
   5 #
   6 # The script tries to preserve the various versions of the bin folder
   7 # by copying the selected bin folder to a "working folder", to prevent
   8 # accidental updates on launch.
   9 #
  10 # Use at your own risk, changing minecraft versions around may result in
  11 # unexpected and undesirable behaviour. You may lose your saves.
  12 # This script does not handle backups of the world data, I suggest using
  13 # deja-dup or similar backup software. It's good for you.
  14
  15 # Written by Einar Jørgen Haraldseid <einar@haraldseid.net>
  16 # inspired by a similar idea by Lars Erik Pedersen
  17
  18 # Released to the public under the WTFPL: http://sam.zoy.org/wtfpl/COPYING
  19
  20 # CONFIG STUFF - change these to suit your system
  21 # Minecraft home folder, where the binaries and saves and stuff are stored:
  22 MC_HOME="${HOME}/.minecraft"
  23 # Location and filename for the Minecraft launcher jar:
  24 MC_LAUNCHER="${HOME}/bin/minecraft.jar"
  25 # Command line to run to start Minecraft:
  26 MC_COMMAND="java -Xmx2048M -Xms1024M -cp ${MC_LAUNCHER} net.minecraft.LauncherFrame"
  27
  28 # This might be needed to fix 64bit java on Linux (path to your 64bit java libs)
  29 # Uncomment this if not suitable.
  30 export LD_LIBRARY_PATH="/usr/java/latest/lib/amd64/"
  31
  32
  33 # Here comes the code
  34
  35 UPDATEMC=0
  36
  37 if [ ${#} -lt 1 ]; then
  38         echo "Usage: 'minecraft <version>' or 'minecraft --add <version>'"
  39         exit 1
  40 fi
  41
  42 if [ "${1}" == "--add" ]; then
  43         if [ "${#}" -ne 2 ]; then
  44                 echo "You must supply what version you are adding: 'minecraft --add <version>'"
  45                 exit 1
  46         else
  47                 MC_NEW_FOLDER="${MC_HOME}/bin-${2}"
  48                 read -p "Will save new bin-folder called bin-${2}, press update when prompted."
  49                 UPDATEMC=1
  50         fi
  51 fi
  52
  53 if [ -z ${MC_HOME} ]; then
  54         echo "Minecraft home folder not set! Baaaad idea!"
  55         exit 1
  56 fi
  57
  58 if [ ! -d ${MC_HOME} ]; then
  59         echo "Minecraft home folder (${MC_HOME}) not found!"
  60         exit 1
  61 fi
  62
  63 if [ ${UPDATEMC} -ne 1 ]; then
  64         MC_VERSION_FOLDER="${MC_HOME}/bin-${1}"
  65 else
  66         MC_VERSION_FOLDER=$(ls -d ${MC_HOME}/bin-* | tail -n 1)
  67 fi
  68
  69 MC_WORKING_FOLDER="${MC_HOME}/bin"
  70
  71 if [ ! -d "${MC_VERSION_FOLDER}" ]; then
  72         echo "Could not find that version folder (${MC_VERSION_FOLDER})"
  73         echo -e "\nAvailable Minecraft versions are:"
  74         echo "---------------------------------"
  75         ls -d ${MC_HOME}/bin-* | cut -d "-" -f 2
  76         exit 1
  77 fi
  78
  79 if [ -d "${MC_WORKING_FOLDER}" ]; then
  80         rm -rf ${MC_WORKING_FOLDER}
  81 elif [ ! -d "${MC_WORKING_FOLDER}" ]; then
  82         echo "Minecraft bin folder (${MC_WORKING_FOLDER}) is not a directory, bailing out."
  83         exit 1
  84 fi
  85
  86 if [ ! -e "${MC_WORKING_FOLDER}" ]; then
  87         cp -r ${MC_VERSION_FOLDER} ${MC_WORKING_FOLDER}
  88         ${MC_COMMAND}
  89         if [ ${UPDATEMC} == 1 ]; then
  90                 cp -r ${MC_WORKING_FOLDER} ${MC_NEW_FOLDER}
  91         fi
  92 fi